Spilopleura ochracea (Montandon, 1895) Olivera & Melo & Dellapé, 2023

Olivera, Leonela, Melo, Maria Cecilia & Dellape, Pablo M., 2023, Revisiting the South American Acanthocephalini (Hemiptera, Coreidae): Spilopleura Stal (status novum), Evolutionary Systematics 7 (1), pp. 35-50 : 35

Spilopleura ochracea (Montandon, 1895) comb. nov.

Figs 6 , 7 , 8 , 9

1895 Acanthocephala ochracea Montandon, 8, pl. 1, fig. 3 [n. sp., Brazil, illustration].

1913 Acanthocephala ochracea : Bergroth, 129.

2010 Acanthocephala ochracea : Packauskas, 18.

2021 Acanthocephala ochracea : CoreoideaSF Team.

Type material.

Holotype ♀ (photograph), Acanthocephala (Metapodius) ochracea Montandon, Bresíl du Nord, Cumbase, type, holotype, Romania (MGAB) (Fig. 6A, B ).

Other examined material.

(Table 1) Brazil: Mato Grosso: 1 ♂ , Parque Nacional Xingu , 12/ 17-II-1965, P.E. Vanzo col. (MZSP) . Paraguay: Itapúa: 1 ♀ , Capitán Miranda, Hotel Tirol , 13/ 15-XII-2017, 27°11'00"S, 55°46'42"W, 827 ft., J.E. Eger col. (MLP) . Peru: Junín: 1 ♂ , Satipo , 750 m, 12-XI-1938, K. Meskendahl col., H. Brailovsky det. (UNAM); Lima: 1 ♂ , Montenegro, Rio Maranon , 06-X-1961, S.J. Williner col. (MACN) .

Diagnosis.

Species entirely yellowish ochraceous, with the anterior region of the metaepisternum darker, and with two dark brown central lines extending along all abdominal tergites. Eyes with its major axis oblique to the dorsal margin of head in lateral view. Thoracic pleurae with sparse setae, never forming a patch. Metatibia with lanceolate expansions. Posteroventral margin of pygophore entire, without a median depression. Expansion of the spermathecal duct tubular, long and curved.

Redescription.

Male. General color yellowish ochraceous. Head. With sparse erect and semierect yellowish setae (Fig. 6C ). Dorsal margin of tylus straight, declined, and compressed to the apex, not surpassing dorsal margin of head (Fig. 6D ). Post-tylar depression shallow, three times shorter than interocellar space. Interocular distance at least two times longer than the width of an eye. Eye with its major axis oblique to the dorsal margin of head in lateral view (Fig. 6D ). Antennae ochraceous; scape, pedicel and basiflagellomere with abundant short and thick semierect dark setae; distiflagellomere with abundant short decumbent yellowish setae, and sparse semierect darker setae. Labium ochraceous, apex of segment IV dark brown, surpassing mesocoxae. Labial segment III longest, segment IV shortest. Thorax. Pronotum ochraceous, anterior lobe and calli with abundant erect yellowish setae; posterior lobe punctate, anterior third with short and thick erect yellowish setae, and posterior third with sparse short decumbent yellowish setae; humeral angles slightly elevated; humeral distance 1.3 times larger than width of abdomen; posterolateral margin with well-developed tubercles on its entire length. Scutellum ochraceous with the apex concolorous, longer than wide, transversely striated, with sparse decumbent yellowish setae. Hemelytra: Clavus and embolium ochraceous, veins concolorous; membrane dark brown, veins concolorous. Thoracic pleurae yellowish ochraceous with the anterior region of the metaepisternum darker, with sparse erect and decumbent yellowish setae; auricle of metathoracic gland and evaporatory area concolorous with pleurae; projection of metathoracic acetabulum conical (Fig. 6E ). Thoracic sterna dark brown, with abundant erect yellowish setae. Legs: Femora ochraceous, with semierect yellowish setae over the surface, and with longer erect setae on ventral margin only in the metafemur. Pro- and mesofemora with the rows of spines on ventral margin ending in a larger apical spine. Metafemur at least 2.7 times wider than profemur (Fig. 7A ); dorsal margin with two rows of concolorous conical setiferous tubercles with the apex darker, anterior row shorter and less developed; ventral margin with two rows of spines that become larger to the apex and ends in a flat dentate projection: anterior row with larger flat spines, posterior row smaller and ends in a larger spine; posterior margin with a row of conical tubercles. Tibiae ochraceous. Metatibia with the dorsal expansion wide and unarmed, maximum width at basal third, then abruptly narrowing to the apex, ending in an acute angle (Fig. 7C ); ventral margin of basal third slightly expanded, margin bordered by two rows of conical irregular setiferous tubercles that become larger to the apex forming only one row. Tarsi yellowish-ochraceous. Abdomen. Dorsum ochraceous, with two darker central lines extending along all abdominal tergites. Sterna ochraceous, with sparse semierect yellowish setae. Abdominal expansion developed on the anterior half, reaching the spiracles. Area of insertion of trichobothria and surrounding area concolorous with sterna. Lateral area of the abdominal sterna striated near the spiracles. Spiracles brown. Male genitalia: Pygophore (Fig. 8A-C ): Lateral margins rounded and abruptly declivent to the apex; posteroventral margin slightly rounded; lateral margins of anterior opening slightly sinuous, parandrias slightly developed. Parameres (Fig. 8D ): Dorsal region of basal shank rounded, slightly narrowing at the middle third, inner margin straight slightly expanded distally, outer margin convex; arm wide and shorter than basal shank. Aedeagus (Fig. 8E, F ): dorsal conjunctival appendages I subrectangular with the apical margin rounded, and with a small median membranous projection between each other.

Variation (observed in one specimen examined): Anterior margin of metaepisternum entirely ochraceous, without a darker area.

Female. Thorax. Humeral distance 1.2 times wider than the abdomen. Posterior row of spines on ventral margin of profemur absent. Metafemur ochraceous, at least 2.4 times wider than profemur (Fig. 7B ); dorsal margin with two rows of small darker conical setiferous tubercles; anterior row of spines of ventral margin with darker spines, posterior row reduced, with tiny concolorous spines that ends in a larger spine; posterior margin with a row of tiny conical tubercles that extends until basal third. Metatibia with lanceolate expansions (Fig. 7D ); maximum width of dorsal expansion at basal third, with a tooth or notch from where it abruptly narrows to the apex; ventral expansion developed in basal half. Abdomen: Female genitalia: Sternite VII (Fig. 9A ): Fisura long, median lobes well developed and quadrangular, overlapping with each other; plica straight, close to anterior margin of the sternite, longer than maximum width of first gonocoxae; posterolateral margins reaching the distal third of first gonocoxae. Paratergite VIII overpassing the apex of first gonocoxae (Fig. 9A ). Dorsal apodeme of first gonocoxa short and wide, quadrangular (Fig. 9B ). Second gonapophysis digitiform, first ramus stout and well sclerotized (Fig. 9C ). Second gonocoxa wide, slightly narrowing at basal third, basal region as wide as apical region (Fig. 9D ). Second gonapophysis shorter than second gonocoxa (Fig. 9D ). Spermatheca (Fig. 9E ): Receptacle apically globose and oval; flexible zone long; distal duct short; dilation of the spermathecal duct tubular, long and curved.

Measurements

(n= 2♂ | 1♀): Total length: ♂ 24.375-24.625 / ♀ 21; head length: ♂ 2.72-2.88 / ♀ 2.496; max head width: ♂ 2.688-2.848 / ♀ 2.528; tylus length: ♂ 1.12-1.224 / ♀ 1.12; post-tylus depression length: ♂ 0.24 / ♀ 0.264; eye width: ♂ 0.672-0.72 / ♀ 0.624; interocular space: ♂ 1.32-1.44 / ♀ 1.248; ocellar distance: ♂ 1.024 / ♀ 0.896; interocellar space: ♂ 0.704 / ♀ 0.444; antennal articles length: scape, ♂ 4.625-5.32 / ♀ 3.807; pedicel, ♂ 4.5 / ♀ 3.76; basiflagellomere, ♂ 4.25 / ♀ 3.525; distiflagellomere, ♂ 9.875 / ♀ 5.605; antennal articles width: scape, ♂ 0.416-0.512 / ♀ 0.384; pedicel, ♂ 0.288 / ♀ 0.224; basiflagellomere, ♂ 0.288 / ♀ 0.224; distiflagellomere, ♂ 0.288 / ♀ 0.288; length of labial segments: I, ♂ 2.115-2.176 / ♀ 1.88; II, ♂ 1.88-2.08 / ♀ 1.88; III, ♂ 2.528-2.585 / ♀ 2.538; IV, ♂ 1.739-1.92 / ♀ 1.692; humeral angles width: ♂ 7.747-8.93 / ♀ 7.5; scutellum length: ♂ 3.232-3.296 / ♀ 2.82; scutellum width: ♂ 2.88 / ♀ 2.632; hemelytra length: ♂ 18-18.125 / ♀ 16.625; profemur width: ♂ 1.056 / ♀ 0.658; metafemur width: ♂ 2.656-2.848 / ♀ 1.598; metafemur length: ♂ 12.625-13.125 / ♀ 10.625; metatibia width: ♂ 3.04-3.2 / ♀ 2.867; metatibia length: ♂ 12.125-13 / ♀ 11.25; abdomen length: ♂ 11.875-12.5 / ♀ 11.25; abdomen width: ♂ 6.625-6.935 / ♀ 6.125.

Distribution.

Brazil, and first record from Paraguay and Peru (Fig. 10 ).

Figures

Figure 6. Spilopleura ochracea (Montandon). A Holotype female in dorsal view and labels; B Holotype female in lateral view; C Head in dorsal view; D Head in lateral view; E Projection of metathoracic acetabulum in males. Abbreviations: MtAc: metathoracic acetabulum.

Figure 7. Spilopleura ochracea (Montandon). A Male metafemur; B Female metafemur; C Male metatibia; D Female metatibia. Abbreviations: dEx: dorsal expansion of metatibia; vEx: ventral expansion of metatibia.

Figure 8. Spilopleura ochracea (Montandon). Male genitalia. A-C Pygophore: A Ventral view; B Dorsal view; C Lateral view; D Right paramere in both views; E-F Aedeagus: E Ventral view; F Dorsal view. Abbreviations: antO: pygophore anterior opening; Ar: paramere arm; bSh: paramere basal shank; Cj: Aedeagus conjunctiva; dApp 1: dorsal conjunctival appendages I; Ds: dorsal sac of conjunctiva; ejD: ejaculatory duct; ejR: ejaculatory reservoir; End: endosoma; gp: gonopore; iMbSh: inner margin of paramere basal shank; laM: pygophore lateral margin; oMbSh: outer margin of paramere basal shank; Pha: phallosoma; postO: pygophore posterior opening; pvM: pygophore posteroventral margin; vApp: ventral conjunctival appendages; Vs: vesica.

Figure 9. Spilopleura ochracea (Montandon). Female genitalia. A Ventral view of the pregenital region and genital plates; B First gonocoxa and first gonapophysis; C First gonapophysis; D Second gonocoxa and second gonapophysis; E Spermatheca. Abbreviations: dA: dorsal apodem; dd: distal duct; df: distal flange; di: dilatation of the sphermatecal duct; fi: fisura; fz: flexible zone; Gp 8: first gonapophysis; Gp 9: Second gonapophysis; Gx 8: first gonocoxa; Gx 9: second gonocoxa; pd: proximal duct; pf: proximal flange; pgS: peg-like setae; pl: plica; Pt 8: paratergite VIII; Pt 9: paratergite IX; Ra 1: first ramus; Ra 2: second ramus; sr: seminal receptacle; VII: Sternite VII.

Figure 10. Distributional map of the species includes in the genus Spilopleura stat. nov. Green dots represent occurrences of S. parensis (Dallas); red triangles represent occurrences of S. ochracea (Montandon) comb. nov.